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Jump93of 100 · 670 light years from Earth

KELT-9 b: hotter than most stars

KELT-9b tops 4,300 °C on its dayside, hotter than most stars, and circles its star in 1.5 days. Facts with their sources.

NASA illustration of KELT-9b beside its bluish star; it is not a photo
Illustration, not a photo Image: NASA/JPL-Caltech · original

Curious facts

  1. Over 4,300 °C

    Its dayside tops 4,600 kelvin, about 4,300 °C: hotter than most stars. 12

  2. So hot it tears molecules apart

    It is so hot that the heat tears apart the molecules in its atmosphere. 1

  3. A year of a day and a half

    It goes all the way around its star in just 1.5 days. 12

KELT-9 b in Orbit

In the game, KELT-9 b is jump 93 of the route, 670 light years from Earth. Its logbook card says:

Logbook · Jump 93

Its dayside hits 4,300 °C, hotter than some stars

I want to try Orbit Already in the group: download

Two steps with the Google account you use on Play: join the group, then download the test. Google Play can take a while, sometimes more than an hour, before it lets you download it; if you see “Item not found”, wait and try again.

What Orbit is like

Sources

  1. NASA JPL, 2017. jpl.nasa.gov/news/astronomers-find-planet-hotter-than-most-stars
  2. NASA, KELT-9 b. science.nasa.gov/exoplanet-catalog/kelt-9-b

Checked between 8 and 11 October 2026.

Illustration, not a photo Image: NASA/JPL-Caltech · original